a-a a-i aaa aaf aai aan aas af- afa aff afi afn afs ai- aia aif aii ain ais an- ana anf ani ann ans as- asa asf asi asn ass faa faf fai fan fas ffa fff ffi ffn ffs fia fif fii fin fis fna fnf fni fnn fns fsa fsf fsi fsn fss i-f ia- iaa iaf iai ian ias ifa iff ifi ifn ifs iia iif iii iin iis in- ina inf ini inn ins is- isa isf isi isn iss n-i naa naf nai nan nas nfa nff nfi nfn nfs nia nif nii nin nis nna nnf nni nnn nns nsa nsf nsi nsn nss saa saf sai san sas sfa sff sfi sfn sfs sia sif sii sin sis sna snf sni snn sns ss- ssa ssf ssi ssn sss